import {VantComponent} from '../common/component'
import {useChildren} from '../common/relation'
import {getRect} from '../common/utils'

VantComponent({
  relation: useChildren('tabbar-item', function () {
    this.updateChildren()
  }),
  props: {
    active: {
      type: null,
      observer: 'updateChildren',
    },
    activeColor: {
      type: String,
      observer: 'updateChildren',
    },
    inactiveColor: {
      type: String,
      observer: 'updateChildren',
    },
    fixed: {
      type: Boolean,
      value: true,
      observer: 'setHeight',
    },
    placeholder: {
      type: Boolean,
      observer: 'setHeight',
    },
    border: {
      type: Boolean,
      value: true,
    },
    zIndex: {
      type: Number,
      value: 1,
    },
    safeAreaInsetBottom: {
      type: Boolean,
      value: true,
    },
  },
  data: {
    height: 50,
  },
  methods: {
    updateChildren() {
      const {children} = this
      if (!Array.isArray(children) || !children.length) {
        return
      }
      children.forEach((child) => child.updateFromParent())
    },
    setHeight() {
      if (!this.data.fixed || !this.data.placeholder) {
        return
      }
      wx.nextTick(() => {
        getRect(this, '.van-tabbar').then((res) => {
          this.setData({height: res.height})
        })
      })
    },
  },
})
